Looks like sawzall is out. It'll reach the front safety latch but the rear latch bolt is recessede in a raised up area just enough to where a blade can't reach it without having to shave off the raised area.
Possible good news, I *may* have found the slave side of the underside of teh cable operated latch mechinism, barely visible from the top 2 openings of teh grill, can see a plate that appears to swing back from the latch bolt nose cone. It's obviously rusted in there, so I left it to soak in penetrating oil for a week or so before attempting anything, but access is severly limited. I may be enjoying my recently aquired anvil and fabricating some interesting picks for this one.